Pump



E. N. TRUMP'AND F. FRIEDRICHS.

' PUMP.

APPLICATION FILED AUG-31.1918.

1 349, 395 Patented Aug. 10, 1920.

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E. N. TRUMP AND F. FRIEDRICHS PUMP. APPLICATION FILED Aue.31. 1913.

Patented Aug. 10, 1920.

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v i/zir .fltforney E. N. TRUMP AND F. FRIEDRICHS.

PUMP. APPLICATION FILED AUG-31, I918.

Patented Aug. 10, 1920.

3 SHEET$--SHEET 3.

Inventors; Edward/WW anaiizmfi'fiieazicha;

V DWARD 1v. TRUMP Arm rnannrninnnions, or stYRAousn, new

' NI E AT r nunrnnny ens Pun rmar.

To all whom it. concern Beit known that WQEDWARUNQTRUMP,a

' citizen of the UnfiedlStates, residing inSyra- I York,

cuse, county of,Onondaga, State of New York, and FRANK Fnlnnnrcns, a subject of the King of Great Britain, resldmg 111 Syra 7 the .weight, .inertla and. momentum of the pipe and its contents are .utilized in'connection with the, functions of the actuating" means or power medium. L V

This application isa COIltlIllltLlLlOIklIl part ofapplication Serial No. 95,062'filed May 3. 1916. l r

' The kinetic energy of themoving parts is utilized to do useful work 'in'such away as to secure the operation ofa steam cylinder more economically than heretofore possible in a direct acting steam pump. Better economy may alsobe secured in a similarwayin connection withan internalcombustion cylunder or other power generating means.

in" the prior. art it has been proposed to] reciprocate'a pipe'ortuloe with a foot valve to cause water to be delivered therethrough, but in none of theseprlor devlces .1s any.

suggestion found ofutilizing the kinetic en.-

ergy to secure an economical operation of a.

power generating means.

- The direct acting wellpnmp now incom-- mon use, comprises a steam cyllnder directly '40 connected to a pump which located in" a well. These pumps are effic ent as regards mechanical losses, but are lneflicient as-re gards steam consumption, because in com; men with other types-of dlrect acting steam pumps, they cannotuse; the steam expansively, and the steam consumption of these pumps isvery large. I

In respect to reciprocating tube pumps t has been found that, besides the normal energy required for simplyraisingthe water;

a nearly equal additional energy is required. to give the tubethe necessary acceleratlon to l. secure. an efficient operation oi this type of, 7

pump. This represents kinetioenergy stored in thetube and, 1f not utilized involvesloss specification of Letters Patent.

Application filed August 31, 1918. Serial useful Im "provement in Pumps, of which-the following as to" offset this 10 pump into general use.

for reciprocating steam atthe beginning of. the lupstrokeL We the steam expansively, and V 1 thereby utilize all of the kinetic-energy in the ratem e' ug-Im, "1 920.

noflasaiaa of e nergy as compared with present, direct actlnghsteam pumps. 1 W

The first step in thisinvention therefore.

is to provideiileans'forutiliziiig or 'recover-v 1 ing this kinetic energy, so as possible and although all this energy cannot befullyutr s'rarnr err-ice, 1

a AfssI;enons P Q E N A O I N onnnw R t r liZed theextreniesimplicity and'low first and V maintenance 'costof the tubepumpiis such small. loss and bring the tube i of the invention in its most The second step complete form consists in recover ng and utilizing this kinetic energyfin suclia Way I as to permit ofousing steam "or other motor 7 iluid expansively and; by operating' on the,

Stumpf cycle wereduce'the steam consumptionisothat We are able to produce a direct acting Well pump which not only gives a steam consumption very much less thanthat of the present direct acting steam pumps but the pump part of the devicecostsless to construct l'ess to install and less to maintain.

The means 'to' recover the kinetic'f energy,-

unentioned as the first step, may be" a cylinder containing an elastic medium with a piston operating. therein connected to the piston rod, in which the piston will compress the elastic medium in the cylinder by the kinetic energypand the compressed cushion will re act to help acceleration inthe return stroke.

In the second step the meansflused in a steam pump are the'combination of this comeression of an elastic cushion, with theshort cut-offiof the steam. That is, we admit; the

cut it off, using water and perhaps part ofthe kinetic en-n ergy incthe tube topcomplete 'jthe stroke. When the piston reachesgtheupper part of exhaust the steam, the piston moves into the upper endof the cylinder which forms an air cushion and the remaining kinetic energy in the tube isst'ored, in this air cushion which reacts and causes the-tube to descend at a' velocity greater than the velocity duetoj; f

desirablein this form of gravity, which is piston emerges pumping; As: soon as the from the air cushiontherenhaustports are closed, thereby trapping the steam in the lower part of the cylinderwhich is com' pressed by the kinetic energy in the tube to a g I 95 thecylinder, and the exhaust ports open to v with the tube 15, and,

tion oi the tube and gives the high com pression necessary to the Stumpf cycle.

Thismethod of utilizing the kinetic energy, so that it permits or a great expansion on the upstroke and of high compression on the downstroke enables this form or pump to be operated by an internal combustion cylin-- der with or without the use of crank or flywheel. Where a flywheel or crank is used, the cushion cylinder not only is desirable to absorb kinetic energy but also to prevent the shock on the bearings which would other wise result from the acceleration and re tardations above referred to. The only difierence between steam and internal combustion is that it is the combustion of the gasor oil that gives the initial impulse on the upstroke, which also must be used e2:- aansively, and there isgas or air instead of steam in the cylinder which forms the com- )IQSSlOll on the downstroke, which compres sion is also essential to the operation of an internal combustion engine.

Referring to the drawings, which illustrate merely by way of example suit-able means for eiiecting our invention;

Figure 1 is a vertical section oi a pump embodying the invention, in which the power cylinder is a single acting una-flow steam cylinder.

Fig. Q'is a similar view showing a separate cushioning cylinder especially useful with condensing steam engines.

3 is a similar view showing crank and il wheel means for actuating the tube, using the cushioning cylinder as in Fig. 2.

Fig. 4: is a similar view showing a single acting una-iiow steam power cylinder and piston Will a differential piston connected therewith operating in a cushioning cylinder.

Fig. 5 is'a vertical section showing a power cylinder adapted to use Similar numerals refer to similar parts throughout the several views.

Referring to Fig. 1, the power piston 11 perating in the Lina-flow single acting steam cylinder 12 is connected by the piston rod 18 through the yoke 1 with the tube 15 having the foot-valve 16. Cylinder 12 is provided with the jacketed head 17 and the steam admission valve 18. T he steam is led to the jacketed head 17 through the supply pipe 19 and passes from the jacketed head 1'? hrough the valve 18 into the cylinder 12 below the piston 11. The steam pressure beneath the piston 11 car ies it upward y after cut-oil, the continued expansion of the steam and tne kinetic energy acquired by the tube causes a continued upward movement of the piston until it passes and opens the exhaust ports 20 so that the expanded steam will pass therethrough to t e exhaust belt 21 and thence to exhaust pipe 22. After passing liquid fuel.

the ports 20 the piston 11 traps and compresses an elastic cushion in the top of cylinder 12 whichbrings t e piston and tube to rest and then re-acts to accelerate the downward movement thereof. Alter covering the exhaust ports 20, in its downward movement, the piston traps the steam which has not escaped and compresses the same back against the heated head as required for securing an effective Stumpi cycle. This downward stroke which is caused primarily by the reaction of the compressed cushion at the top of the cylinder, coiiperating with the force of gravity, results in afar more effective compression or" the steam in the cylinder head than would be due to gravity alone. The compressed steam in the cylinder head also serves as a cushion finally to arrest the downward movement of the piston and the tube.

Upon the upstroke of the piston and tube t is water that has entered the bottom of the tube past the toot-valve, to the level of the supply in'the well, is also carried upwardly and when the piston comes to rest due to thecompression of the elastic cushion at the top of the cylinder, the water in the tube cannot stop so suddenly and consequently flows by momentum upwardly, drawing in more water through the too -valve 16.

The compressed elastic cushion in the top of the cylinder 12, as above stated, will start the piston and tube downwardly at a velocity greater than that due to gravity so that water will continue to rise in tube 15, and consequently more water will enter past loot-valve 16.

It can readily be seen that the degree of said compression by the downstroke will depend upon the relative velocities of the water and the tube, and it may be possible to operate the tube at so high a velocity that the water would not come to rest at all, but that the tube would start on its second upward stroke before the water had entirely come to rest on its first upward movement. This it can readily be understood gives a wide range of; conditions in order to obtain any desired compression. 7

"With respect to the admission of steam to cylinder 12, means are provided for controlling the actuation of valve 18 so as to permit er a considerable movement of the piston after passing the point necessary to secure the operation of the valve actuating mechanism.

This may be called a delayed or retarded valve actuation. It consists in moving the valve spindle 23 by the operation of the lever 2 1 connected by link 25 with yoke 14, so that the spindle is brought to such a position beitore piston 11 has reached the end of its downstroke, to open communication between the space to the rear of valve piston 26 and the exhaust so that the pressure is r lieved to permit the epenirig of valve of said valve of the valve spindle 18, due to the pressure oii't e opposite side piston 26. p The time required i may be secured,

erly to checkthe (mt-off is secured movingthe spindle into the position,establishing communication between space to therear of valve piston26'to cause the closing of valve 18. a

. One very great. advantage of thesteam tube pump; Without discharge valve is that vary the capacity simply it is possible to varyingthe cutoft; whereas in anyother formcfsteam pump usingsteam expan sively, when. the capacity is small; the cut- -ton 39, the projection 52 connected with the piston rod 43 will engagethe tappet 53 offs have to belengthened to preventstope ping-on the dead center.- 7

In Fig. 2 the means for reciprocating the tube 1'5 nected with the piston rod "30. An additional piston 31 isprovidedonthe rod 80, which .piston operates in the cylinder 32 which is stroke .of said l rod 30. Such a device may be desirable when run; ning condensing, and'there' should not" be sufiicient cushion-in the trapped steam propmaybe conditions in, which it is desirable to have both ends of this air cylinder closed qto form an air cushion-or checkfor-each diameter;

7 end of the reciprocating movement.

In Fig; 3 the meansjfor reciprocating the tube comprises the crank" 19 and flywheel l9 driven by any suitable primary medium.

In this case'the cushioning cylinder 32. and 1 piston 31 are also used to absorb and give out energy andv prevent shock to the bear,- ings due to the acceleration and retardation of the tube. In this with openings 33 intermedia-te its two ends. InFig. 4 a differential piston 34, 85, is

i provided having the'extension 35 of greater 34 being thepower piston operat v ingin'thepower cylinder'36 while 35 opcrates in the air cushioncylinder 37 compressed charge which is expanded be- 4 pressed in the'cylinder 38above piston 39 forces thepiston upwardly tube '15. Air is comthe piston low the carrying with it the and also in the annular space 40,

' in communicationwith the. cylinder through the pistonis arrested. When covers 1 the movementof p greases] the steam; pressure and p the comprisesthe single acting. una-flow steam cylinder 28 having the piston 29 c'oncylinder providedwith openings 33 .inter-" mediate its two ends, but which is closed at its lower end forming an air cushion or checkifor the down weight of the parts. iThere I example thecylinder, 32 is shown closed at each end and provided which is. the functionsrecited in-the claims.

as platen peas 1, and

passes above and uncovers the, at the same time the tappet 42on piston rod encounters the stemi44 of valve 45, which opens this valve, the compressed air n; annular'spa'ce 4O rushes throughportsf41 intofcylinder38 .to drive out the burntproducts throughport46. A;

fresh supply. of air enters space 40pa-st nonreturnvalve 40. It' may in some-Qcases,

be desirable to use a differential piston and cylinder similar to that shown in Fig. 4,;- to increase thefvolumelofscavenging air. 5

, of piston 39 the spring 4Y will actuate, through lever 48, the H During the upstroke rod 49 ofthe plunger operating in-the cylinder -50 to draw in a charge of liquid fuel.

from a suitable source v pipe 51. Uponthe downstroke ofthe pisof supply through i rod 5 4 to. mov e the leverr48 and plunger 1 redeem the opposite-direction,to"force, a charge of liquid fuel through, pipe 55 into zle not shown. It will be understood that 38- through a suitable spraying nozthis'liquid fuel is sprayed into the cylinder into air compressed by the downstroke of the 1 piston andthus we have acompressed charge for the next stroke. 1 v V Wherea gas cyllnder is used with an exhaust valve and that valve should leak badlyopen, or where for any reason theremight not be sufiicient comproperly to arrest or should become stuck pressionin the cylinder the working parts at the end ofthe downstrokepit will bedesirable to provide some form-of dash-pot for cushioning the parts and preventing too great a shock. It is of course desirable that this dash-pot shouldnot be'acting until the descendingpistonis near the bottom of the cylinder or at the pointofdesigned compression, in order that the 'dash-pot will not interfere with thecompression. 1

In Fig 5 is showna simple form of hydraulic dash-pot the pipe 57 let the water flow 'freely inand out-of theannular space 58, butwhen the holes are covered by the enlargement 59 of" tube 15, the water remaining in the-annular space 58-being forced outthrough small orifices orby theleakagebetween the tube I and the surrounding Referring to Fig. 5,;whichsho'ws an in 1 terna'l combustion power'cylinder 38; the

pipe, makes an eifective hydraulic dash-pot; a Themeans illustrated in the drawings are merely examples of suitable actuating means; obviously any other means for ac.- tuating the tube wouldserve ineffecting'our I l in whichthe ho1es56 in V invention, so longas the same cooperatesin if r pv co pr ng a t e p ovided suitable valve, actuating means for:

therein, said cylinder provided with eX- haust ports adapted to be opened near the end of the power stroke but maintained closed by the piston during the balance of its reciprocating movements, said cylinder having jacketed head for live steam at its steam inlet end.

2. A pump comprising a tube provided with a suitable valve, actuating means for reciprocating the tube comprising a power cylinder and an elongated piston operating therein, said cylinder provided with exhaust ports adapted to be'opened near the end of the power stroke but maintained closed by the piston during the balance of its rcciprocating movements, said cylinder having a jacketed head for live steam at its steam inlet end, and an auxiliary cylinder and a piston operating therein in operative relation wlth the power piston for cushioning the stroke at the end thereof.

8. A- pump comprising a reciprocating tube provided with a suitable valve, actuating means for causing the power stroke in said reciprocating movement of the tube and aniauxiliary cylinder and piston operating therein, in operative relationship with the actuating means and moving with the reciprocating tube for cushioning the return stroke of the reciprocating tube at the end thereof. V

i. A pump comprising a tube provided with a suitable valve, actuating means for reciprocating the tube comprisin a power cylinder and an elongated piston operating therein, said cylinder provided with exhaust ports adapted to be opened near the end of the power the piston during the balance of its reciprocating movements, said cylinder having a jacketed head for live steam at its steam inlet end, and means forming an'air cushion adapted to be compressed atthe end of the power stroke and to react in connectionwith the return stroke.

EDWARD n. TRUMP. FRANK FRIEDRICHS.

stroke but maintained closed by 

